/Engine/Source/Runtime/Slate/Public/Framework/Application/SlateApplication.h
[EDropEffect::Type](API\Runtime\ApplicationCore\GenericPlatform\EDropEffect__Type) OnDragEnter ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWindow](API\Runtime\SlateCore\Widgets\SWindow) > & Window, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FExternalDragOperation](API\Runtime\SlateCore\Input\FExternalDragOperation) > & DragDropOperation )